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Finding the Fourth Proportional to 101,011.50, 139,409.37 and 65,305.62

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Solution

The fourth proportional to 101,011.50, 139,409.37 and 65,305.62 is: 90,130.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,011.50 : 139,409.37 = 65,305.62 : x
  2. Step 2: Convert to fraction form
    101,011.50/139,409.37 = 65,305.62/x
  3. Step 3: Cross multiply
    101,011.50x = 139,409.37 × 65,305.62
  4. Step 4: Simplify right side
    101,011.50x = 9,104,215,341.66
  5. Step 5: Solve for x
    x = 9,104,215,341.66/101,011.50
  6. Step 6: Final answer
    x = 90,130.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.